What does the half moon on the fingernail mean?

Medically, it's called a crescent moon, not the moon. From the perspective of traditional Chinese medicine, if the crescent moon on a person's nails is radian and shiny, it means that this person is full of qi and blood; If the crescent moon becomes smaller or gradually disappears, it means that the human body's qi and blood are declining and its physical condition is not as good as before. It is indeed recorded in Chinese medicine that a person's heart function is good or not, which can be judged by the white crescent moon. Traditional Chinese medicine believes that the liver stores blood, and the quality of blood circulation will directly affect the heart function, while the liver is concentrated on people's nails. Generally speaking, people with white crescent moon are full of energy and have smooth blood circulation; The white crescent moon is small or not at all, but the mood is weak and the blood circulation may not be very good. The liver began to understand the eyes and main tendons, and its brilliance lies in the claws. It can be seen that the rise and fall of liver blood can affect the decline and fall of claw nails.